Roller journal



ch 3l, 1936. `1 1 R` KUHLNGEL 2,935,485

ROLLER JOURNAL Filed Maron 12, 1954 2 sheetsheet l /7 mil,

24 Z0 58 3 q J7 2&7 7 J7 44@ f6 M' ZZ 44 i/K ff J4@ ,zg 4. 4/ i 26M' 40 Zi .30

L. R. KUHLENGEL ROLLER JOURNAL Filed March 12, 1954 zsnets-sneet 2 Patented Mar. 3l, 1936 UNITED STATES PATENT OFFICE ROLLER JOURNAL Application March 12, 1934, Serial No. 715,123

3 Claims.

'I'his invention relates to new and useful improvements in roller journals for roller mills. In this type o-f mill the pulverent material is ground between a horizontally disposed stationary ring called bull ring, and a plurality of rollers, which latter are revolubly mounted on pendent journals or arms for rotation about the axis of said ring and are forced against the inner or grinding surface thereof by the centrifugal action.

The journals or arms are pivotally suspended at their upper ends from suitable arms of a support or spider carried by a vertically disposed revoluble shaft.

Among the main objects of the invention is the pro-vision of a journal which is of simple construction so that it can be economically manufactured, which is of durable construction, and which forms an efficient bearing for the rotating parts supporting the roller.

Other objects of the invention are to provide a roller journal provided with ball bearings for revolubly supporting the rotating parts of the journal and the roller carried thereby, said journal having a large lubricating capacity whereby said bearings are at all times amply lubricated without requiring attention at frequent intervals.

Further objects of the invention are to provide improved means for supporting the rotating parts of the journal on the stationary part thereof and to provide an emcient seal for excluding dust from the interior of said journal.

With these and other objects in view my invention consists in `certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illus- Y trated in the accompanying drawings, in which- Figure 1 is a vertical cross section through my improved roller journal.

Figure 2 is an enlarged horizontal cross section taken on line 2--2 of Figure 1.

Figure 3 is an enlarged horizontal cross section taken on lline 33 of Figure 1.

Figure 4 is an enlarged horizontal cross section taken on line 4--4 of Figure l.

Figure 5 is an enlarged fragmental cross section showing the heavy grease sealing joint between the stationary and revoluble casing member,

Referring by numerals to the accompanying drawings, I9 indicates a horizontally disposed trunnion shaft of a revoluble support or spider (not shown). A casing I i is provided on one side with an integrally formed horizontally disposed 'extension I2 for receiving shaft Ill and pivotally supporting said casing inposition. This casing I I is formed with an axially disposed bore. I4 in which is received the upper portion of a shaft I5. Casing II forms the upper stationary part of the journal and shaft I5 is held in xed position therein and `extends downwardly therefrom.

'The upper end of casing Il is internally screwthreaded, as indicated at I3, and the upper end of shaft I5 is screw-threaded as indicated atV I6 for engagement with said screw-threaded bore I3. The upper extremity of shaft I5 extends outwardly from casing I9 and receives a nut I'I which can be tightened against said upper end of casing II to lock said shaft against displacement.

The lower end of casing II terminates in an annular skirt or downwardly presented flange I8 forming an ,enlarged bore I9. The upper end 20 of a revoluble casing member 2l isreceived in the bore I9.

This revoluble casing member 2I is formed with an axially disposed comparatively large bore 22, the upper end of which is reduced in diameter, as indicated at 23, and receives a tubular bearing 24 which is engaged by shaft 15.1 This bearing 24 is provided at its upper end with a laterally key 34 holds the roller non-rotatively on memb-er 30.

The lower end of member 30 is provided with an externally screw-threaded extension 35 on which is screw-seated a nut 36 which'prevents l displacement of roller from member 30.

Shaft I5 is formedwith an enlargement I5a which has bearing in sleeve 24. The upper end of this enlargement bears against the shoulder I9a formed by the enlarged bore I9. A shouldered portion I5b is formed on shaft I5 immediately Ybelow portion I5a and is of smaller disposed collar Y24hr which is seated in the upper diameter than the latter. A ball bearing 31 is Y bearing against the shoulder formed by the reduced upper end 23 of casing 2l.

.A V-cootlparatively' long portion |50 of reduced shaft I5 and nut 42.

diameter extends downwardly from portion I5b and has its lower end terminating o'n a horizontal plane with shoulder 26 of casing 2|. The shaft portion I5d disposed below portion |5c is reduced in diameter and receives a ball bearing 40. 'I'he lower end of said portion I5d is provided with an external screw-thread, as indicated at I5e, and receives a nut 42.

Ball bearing 40 has its inner ball race member 4I engaged at its upper end by the lower end or sho'ulder of portion I5c while its lower end is engaged by nut 42, while the outer ball race member 43 is disposed within the enlarged bore 25 and has its upper end engaging shoulder 26.

A sleeve 44 is arranged on portion |5c and the upper end thereof bears against the shoulder or lower end of portion |517 and the underside of the inner ball race member 38 of bearing 31. The lower end of said sleeve 44 bears against the upper end of the inner ball race member 42 of bearing 40. Thus bearings 31 and 4U and sleeve 44 are held in assembled relation on shaft 5 by nut 42 and the casing 2| and parts associated therewith are revolubly supported on said shaft by said bearings.

The upper end of member 30 is formed with a concave or dished-out recess 45 to provide a suitable clearance for the threaded end |56 of An opening 46 connects recess 45 with a sump or reservoir 41, which latter is formed in member 30 below thisrecess.

Sleeve 44 has formed integral therewith near its upper end a radial flange 48 which terminates in an upwardly presented annular flange 49.

Thus a circular chamber or trough 50 is formed which opens upwardly and holds a supply of lubricant, such as grease, in close proximity to` the bearing 31. Flange 49 is preferably spaced from casing 2| to provide operating clearance therebetween. The upper edge of this ange 49 is disposed below the horizontal plane of the upper end of sleeve 44 and casing 2| is provided with a radially disposed opening or bore 5| on a horizontal plane above said upper edge so that lubricant can be introduced into said chamber 50. A screw plug52 is used to close said opening 5|.

A circular flange 54 is formed integral with sleeve 44 near the lower end thereof and the edge of this ange is spaced from the face of bo're 2'2 to provide operating clearance and permit grease to flow from annular chamber 55 on to bearing 40. This annular chamber 55 is formed in bore 22 by sleeve 44 and the flanged portions thereof. It serves td hold a supply of lubricant which is introduced thereinto through an opening 56 formed radially in casing 2| near the upper end of said chamber 55. A screw plug 51 is used to close said opening.

The ends I8 and 20 of casing members I| and 2| have stepped or shoulder engagement with each other. The upper end 20 of the revoluble casing member 2| has two spaced-apart upwardly presented annular shoulders 58 and 59. The end I8 of stationary casing member I has its annular edge 60 disposed immediately above .shoulder 59 while a downwardly presented shoul- Vin the same horizontal plane with groove 52.

Thus the two grooves combine to form an annular chamber, the access to which is through a bore or aperture 64 formed in skirt I8. This aperture is screw-threaded and is normally closed by a screw plug 65. The annular chamber is lled with heavy grease through aperture 64 and forms a dust-proof seal between the stationary member and revoluble member 2|. During the operation, some of the grease finds its way downwardly between the two members and enters the shouldered portions. The upwardly presented annular shoulders 5B and 59 are provided, respectively, with upwardly presented grooves 58a and 59a which retain the grease and form additional seals between the casing members.

Bearing 24 is lubricated by light oil which is admitted through a duct 66 formed in member I| above skirt portion I8. The inner end of this duct opens adjacent to the upper end of said bearing while the outer end is normally closed by a screw plug 61.

Ball bearing 31 is lubricated by grease which flows into' chamber 58 through bore 5| when plug 52 is removed. The surplus grease enters chamber 55. However, to facilitate the admission of grease into the last-mentioned chamber plug 51 can be removed and grease forced into member 2| through bore 5E. The grease is forced from chamber 55 into bearing 40 and thence into' sump 41. Thus bearings 31 and 40 are amply supplied with grease and chamber 55 receives sufficient amount of grease so that relling is required at comparatively long intervals.

In assembling the journal, member 2|, bearings 31 and 40, and sleeve 44 are placed on shaft |5 and secured in position by nut 42 which is then locked in place by a pin 42a. Terminal member 30 is now attached to member 2| by bolts 28 and roller 32 is mounted on member 30. 'Ihe shaft l5 with the revoluble structure attached thereto is then screw-threaded into member I|. During this operation, shaft I5 is preferably held in fixed relation with the revoluble member 2| by means of a tool which is inserted through bore 56 and aperture 44a in sleeve 44 into a bore |51 radially disposed in shaft portion |5c. After the `journal is assembled, oil is supplied to lconduit 24a and grease to bearings 31 and 40 as hereinbefore described.

I claim:

1. In a roller journal construction, the combination of a stationary casing member, a shaft fixed therein and projecting below the lower end thereof, a revoluble casing member revoluble mounted on and enclosing the projecting portion of said shaft and having its upper end enclosed Within the lower end of said stationary casing member, the upper end of said revoluble casing member' being provided with a plurality of upwardly presented annular shoulders and the lower end of said stationary casing member being provided with a corresponding number of downwardly presented annular shoulders, whereby a multiple stepped joint is provided between the two ends of said casing member, and means for supplying heavy grease to the shouldered portions of said casing member ends.

2. In a roller journal construction, the combination of a stationary casing member, a shaft fixed therein and projecting below the lower end thereof, a revoluble casing member revolubly mounted on and enclosing the projecting portion of said shaft and having its upper end enclosed Within the lower end of said stationary casing member, said upper end of. said revoluble casing member being provided with a plurality of upwardly presented annular shoulders, each of which is formed with an upwardly presented grease retaining groove, the' lower end oi said stationary casing member being provided with a corresponding number of downwardly presented annular shoulders, thereby providing a plurality of lsteppeci''joints between said ends" of said casing members, said stationary casing member being provided with an opening through which heavy grease is forced between said 'interengaged endsand fills the grooves in the annular shoulders'of said revoluble casing member.

3. In a-jroller journal construction, the oombination ofja, stationary casing member, a shaft fixed therein and projecting `below the lower end thereof, a"'revoluble casing member revolubly mounted on and enclosing the projecting portion of said shaft and having its upper end enclosed Within the lower end of said stationary casing member, said upper end of said revoluble casing member being provided with ay plurality of upwardly presented annular shoulders, each of which is formed with an upwardly presented grease-retaining groove andthe lower end of. said stationary casing mernber being provided with a corresponding numbexj; of downwardly presented annular shoulders', whereby a plurality of stepped joints is formed between said ends,v

the adjacent faces of said interngaged ends being provided above the uppemiofst stepped;, joint with opposed peripheral groovesarranged in the same horizontal plane and forxring a grease receiving chamber, said stationary,v casing member being formed with a bore opening into said chamber to admit grease thereiiito, and a screwplug for closing said bore.

LOUIS RQKUHLENGEL. 

